EUVD-2026-44266
GHSA-95p8-vgfr-p8pm
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Network-delivered malicious media (AV:N), no auth needed (PR:N), but the victim must open the file (UI:R); a heap RCE yields full C:H/I:H/A:H within the process (S:U).
Primary rating from Vendor (microsoft).
CVSS VectorVendor: microsoft
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Lifecycle Timeline
2DescriptionCVE.org
Heap-based buffer overflow in Microsoft Windows Media Foundation allows an unauthorized attacker to execute code over a network.
AnalysisAI
Remote code execution in Microsoft Windows Media Foundation lets an unauthenticated network attacker run arbitrary code on the victim's machine when the target opens or renders a maliciously crafted media file or stream. The flaw is a heap-based buffer overflow (CWE-122) affecting a broad range of Windows client and server releases from Windows 10 1607 through Windows 11 26H1 and Server 2016 through Server 2025. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires the victim to open, play, or preview attacker-supplied media content that is processed by Windows Media Foundation - the UI:R metric confirms mandatory user interaction, so this is not zero-click. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H, 8.8 High) indicates a network-reachable, low-complexity, unauthenticated bug with full confidentiality/integrity/availability impact, gated only by required user interaction. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker crafts a malicious media file (or a web page/stream that triggers Media Foundation decoding) and delivers it via phishing email, chat, or a compromised/attacker-controlled website. When the victim opens or previews the file, the malformed data overflows a heap buffer in MF, corrupting heap memory and allowing the attacker to execute code in the context of the affected application. … |
| Remediation | Apply the Microsoft security update for CVE-2026-57090 for your specific Windows build - patch available per vendor advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57090; consult that page for the exact KB number and fixed build for each OS version, as no single fixed version string applies across the entire product range. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, inventory all Windows 10, 11, and Server systems across the enterprise to identify exposure scope and prioritize critical business systems. …
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Same weakness CWE-122 – Heap-based Buffer Overflow
View allSame technique Heap Overflow
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External POC / Exploit Code
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